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1999 Ford F-150 4.2L Hesitation, Misfire
Posted to Ford Driveability on 12/28/2005 9 Replies

costumer complant lag power miss out check pugs replaced check codes, check mas air flow sensor with lab scope snap throttle to wide open,won't go over 3. volts cleaned some replaced a little better my consern is scanner shows mas sensor @@52g/s at 2.34 volts ...

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  Related Documents & Media  1999 Ford F-150

 
Message Closed w/FIX

car Vehicle Data

1999 Ford F-150

VIN 1FTZ1729XK
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / mpfi
EmissionsOBD-II Compliant
SymptomsHesitation, Misfire
OccursCold, Hot, on Accel
Misc.Fuelpresure 34 Volume 12Oz 10Seconds

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P1518Throttle Actuator Control Module Serial Data Malfunction
Message Closed w/FIX

car Vehicle Data

1999 Ford F-150

VIN 1FTZ1729XK
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / mpfi
EmissionsOBD-II Compliant
SymptomsHesitation, Misfire
OccursCold, Hot, on Accel
Misc.Fuelpresure 34 Volume 12Oz 10Seconds

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0174Fuel System Too Lean (Bank 2)
P1518Throttle Actuator Control Module Serial Data Malfunction